NCP6323, NCV6323
3 MHz, 2 A Synchronous
Buck Converter
High Efficiency, Low Ripple, Adjustable
Output Voltage
The NCP/NCV6323 is a synchronous buck converter which is
optimized to supply different sub systems of portable applications
powered by one cell Li−ion or three cell Alkaline/NiCd/NiMH
batteries. The devices are able to deliver up to 2 A on an external
adjustable voltage. Operation with 3 MHz switching frequency allows
employing small size inductor and capacitors. Input supply voltage
feedforward control is employed to deal with wide input voltage
range. Synchronous rectification offer improved system efficiency.
The NCP/NCV6323 is in a space saving, low profile 2.0 x 2.0 x
0.75 mm WDFN−8 package.
Features
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MARKING
DIAGRAMS
1
1
23 MG
G
WDFN8
(NCV6323)
CASE 511BT
1
1
NN MG
G
•
•
•
•
•
•
•
•
•
•
•
•
•
•
2.5 V to 5.5 V Input Voltage Range
External Adjustable Voltage
Up to 2 A Output Current
3 MHz Switching Frequency
Synchronous Rectification
Enable Input
Power Good Output Option
Soft Start
Over Current Protection
Active Discharge When Disabled
Thermal Shutdown Protection
WDFN−8, 2 x 2 mm, 0.5 mm Pitch Package
Maximum 0.8 mm Height for Super Thin Applications
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
•
This is a Pb−Free Device
Typical Applications
WDFN8
(NCP6323)
CASE 511BE
23/NN = Specific Device Code
M = Date Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
PINOUT
PGND
SW
AGND
1
2
9
3
6
5
(Top View)
PG
EN
8
7
PVIN
AVIN
FB
4
•
•
•
•
•
•
•
Cellular Phones, Smart Phones, and PDAs
Portable Media Players
Digital Still Cameras
Wireless and DSL Modems
USB Powered Devices
Point of Load
Game and Entertainment System
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 2 of this data sheet.
©
Semiconductor Components Industries, LLC, 2015
1
October, 2015 − Rev. 4
Publication Order Number:
NCV6323/D
NCP6323, NCV6323
Vo = 0.6V to Vin
Cout
10uF
R1
Cfb
1uH
NCP/NCV6323
PGND
SW
AGND
FB
R2
PVIN
AVIN
PG
EN
Cin
10uF
Rpg
1M
Power Good
Enable
Vin = 2.5 V to 5.5 V
(a) Power Good Output Option (NCP/NCV6323)
Figure 1. Typical Application Circuit
PIN DESCRIPTION
Pin
1
2
3
4
5
6
7
Name
PGND
SW
AGND
FB
EN
PG
AVIN
Type
Power
Ground
Power
Output
Analog
Ground
Analog
Input
Digital
Input
Digital
Output
Analog
Input
Power
Input
Exposed
Pad
Description
Power Ground for power, analog blocks. Must be connected to the system ground.
Switch Power pin connects power transistors to one end of the inductor.
Analog Ground analog and digital blocks. Must be connected to the system ground.
Feedback Voltage from the buck converter output. This is the input to the error amplifier. This pin
is connected to the resistor divider network between the output and AGND.
Enable of the IC. High level at this pin enables the device. Low level at this pin disables the de-
vice.
It is open drain output. Low level at this pin indicates the device is not in power good, while high
impedance at this pin indicates the device is in power good.
Analog Supply. This pin is the analog and the digital supply of the device. An optional 1
mF
or lar-
ger ceramic capacitor bypasses this input to the ground. This capacitor should be placed as close
as possible to this input.
Power Supply Input. This pin is the power supply of the device. A 10
mF
or larger ceramic capacit-
or must bypass this input to the ground. This capacitor should be placed as close a possible to
this input.
Exposed Pad. Must be soldered to system ground to achieve power dissipation performances.
This pin is internally unconnected
8
PVIN
9
PAD
ORDERING INFORMATION
Device
NCP6323DMTAATBG
NCV6323BMTAATBG
Marking
NN
23
Package
WDFN8
(Pb−Free)
WDFN8
(Pb−Free)
Shipping
†
3000 / Tape & Reel
3000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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2
NCP6323, NCV6323
Vin
Cin
10uF
L
PVIN
8
SW
2
1uH
Cout
10uF
Vo
AVIN
7
UVLO
PWM
Control
PGND
1
R1
Cfb
FB
4
R2
Enable
EN
5
Rpg
1M
Power Good
PG
6
PG
Logic Control
&
Current Limit
&
Thermal
Shutdown
Error
Amp
AGND
3
Reference
Voltage
Figure 2. Functional Block Diagram
MAXIMUM RATINGS
Value
Rating
Input Supply Voltage to GND
Switch Node to GND
EN, PG to GND
FB to GND
Human Body Model (HBM) ESD Rating are (Note 1)
Machine Model (MM) ESD Rating (Note 1)
Latchup Current (Note 2)
Operating Junction Temperature Range (Note 3)
Operating Ambient Temperature Range
Storage Temperature Range
Thermal Resistance Junction−to−Top Case (Note 4)
Thermal Resistance Junction−to−Board (Note 4)
Thermal Resistance Junction−to−Ambient (Note 4)
Power Dissipation (Note 5)
Moisture Sensitivity Level (Note 6)
NCP6323
NCV6323
Symbol
V
PVIN
, V
AVIN
V
SW
V
EN
, V
PG
V
FB
ESD HBM
ESD MM
I
LU
T
J
T
A
T
STG
R
qJC
R
qJB
R
qJA
P
D
MSL
−100
−40
−40
−40
−55
12
30
62
1.6
1
Min
−0.3
−0.3
−0.3
−0.3
Max
7.0
7.0
7.0
7.0
2000
200
100
125
85
125
150
Unit
V
V
V
V
V
V
mA
°C
°C
°C
°C/W
°C/W
°C/W
W
−
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. This device series contains ESD protection and passes the following tests:
Human Body Model (HBM)
±2.0
kV per JEDEC standard: JESD22−A114.
Machine Model (MM)
±200
V per JEDEC standard: JESD22−A115.
2. Latchup Current per JEDEC standard: JESD78 Class II.
3. The thermal shutdown set to 150°C (typical) avoids potential irreversible damage on the device due to power dissipation.
4. The thermal resistance values are dependent of the PCB heat dissipation. The board used to drive this data was an 80x50 mm NCP6324EVB
board. It is a multilayer board with 1 ounce internal power and ground planes and 2−1 ounce copper traces on top and bottom of the board.
If the copper traces of top and bottom are 1 ounce too, R
qJC
= 11°C/W, R
qJB
= 30°C/W, and R
qJA
= 72°C/W.
5. The maximum power dissipation (PD) is dependent on input voltage, maximum output current and external components selected.
6. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
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3
NCP6323, NCV6323
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.6 V, V
OUT
= 1.8 V, L = 1
mH,
C = 10
mF,
typical values are referenced to T
J
= 25°C, Min
and Max values are referenced to T
J
up to 125°C, unless other noted.)
Symbol
SUPPLY VOLTAGE
V
IN
Input Voltage V
IN
Range
(Note 7)
2.5
−
5.5
V
Characteristics
Test Conditions
Min
Typ
Max
Unit
SUPPLY CURRENT
I
Q
I
SD
V
IN
Quiescent Supply Current
V
IN
Shutdown Current
EN high, no load, Forced PWM Mode
EN low (Note 9 for NCP6323)
−
−
5.7
−
−
1
mA
mA
OUTPUT VOLTAGE
V
OUT
V
FB
Output Voltage Range
FB Voltage
FB Voltage in Load Regulation
FB Voltage in Line Regulation
D
MAX
Maximum Duty Cycle
(Note 8)
PWM Mode
V
IN
= 3.6 V, I
OUT
from 200 mA to I
OUTMAX
,
PWM mode (Note 8)
I
OUT
= 200 mA, V
IN
from MAX (V
NOM
+
0.5 V, 2.3 V) to 5.5 V, PWM mode (Note 8)
(Note 8)
0.6
594
−
−
−
−
600
−0.5
0
100
V
IN
606
−
−
−
V
mV
%/A
%/V
%
OUTPUT CURRENT
I
OUTMAX
I
LIMP
I
LIMN
Output Current Capability
Output Peak Current Limit P−Channel
Output Peak Current Limit N−Channel
(Note 8)
2.0
2.3
−
2.8
0.9
−
3.3
A
A
A
VOLTAGE MONITOR
V
INUV−
V
INHYS
V
PGL
V
PGHYS
V
IN
UVLO Falling Threshold
V
IN
UVLO Hysteresis
Power Good Low Threshold
Power Good Hysteresis
V
OUT
falls down to cross the threshold
(percentage of FB voltage)
V
OUT
rises up to cross the threshold
(percentage of Power Good Low Threshold
(V
PGL
) voltage)
From EN rising edge to PG going high.
From EN falling edge to PG going low.
(Note 8)
From V
FB
going higher than 95% nominal
level to PG going high.
Not for the first time in start up. (Note 8)
From V
FB
going lower than 90% nominal
level to PG going low. (Note 8)
Voltage at PG pin with 5 mA sink current
3.6 V at PG pin when power good valid
−
60
87
0
−
140
90
5
2.4
200
92
7
V
mV
%
%
Td
PGH1
Td
PGL1
Td
PGH
Power Good High Delay in Start Up
Power Good Low Delay in Shut Down
Power Good High Delay in Regulation
−
−
−
1.15
8
5
−
−
−
ms
ms
ms
Td
PGL
VPG_L
PG_LK
Power Good Low Delay in Regulation
Power Good Pin Low Voltage
Power Good Pin Leakage Current
−
−
−
8
−
−
−
0.3
100
ms
V
nA
INTEGRATED MOSFETs
R
ON_H
R
ON_L
High−Side MOSFET ON Resistance
Low−Side MOSFET ON Resistance
V
IN
= 3.6 V (Note 9 for NCP6323)
V
IN
= 5 V (Note 9 for NCP6323)
V
IN
= 3.6 V (Note 9 for NCP6323)
V
IN
= 5 V (Note 9 for NCP6323)
−
−
160
130
110
100
200
−
140
−
mW
mW
SWITCHING FREQUENCY
F
SW
Normal Operation Frequency
2.7
3.0
3.3
MHz
7. Operation above 5.5 V input voltage for extended periods may affect device reliability. At the first power−up, input voltage must be > 2.6 V.
8. Guaranteed by design, not tested in production.
9. Maximum value applies for T
J
= 85°C.
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4
NCP6323, NCV6323
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.6 V, V
OUT
= 1.8 V, L = 1
mH,
C = 10
mF,
typical values are referenced to T
J
= 25°C, Min
and Max values are referenced to T
J
up to 125°C, unless other noted.)
Symbol
SOFT START
T
SS
Soft−Start Time
Soft−Start Time
Soft−Start Time
CONTROL LOGIC
V
EN_H
V
EN_L
V
EN_HYS
I
EN_BIAS
EN Input High Voltage
EN Input Low Voltage
EN Input Hysteresis
EN Input Bias Current
1.1
−
−
−
−
270
0.1
−
0.4
−
1
V
V
mV
mA
W
°C
°C
NCV6323
NCP6323D
NCP6323D
Time from EN to 90% of
output voltage target
Time from 10% to 90% of
output voltage target
0
0
0.16
0.4
0.54
0.24
1
1
0.3
ms
Characteristics
Test Conditions
Min
Typ
Max
Unit
OUTPUT ACTIVE DISCHARGE
R_DIS
Internal Output Discharge Resistance
from SW to PGND
75
500
700
THERMAL SHUTDOWN
T
SD
T
SD_HYS
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
−
−
170
25
−
−
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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